The structuring principles laid down in the International Standard 81346 series: Industrial systems, installations and equipment and industrial products - Structuring principles and reference designation, developed jointly by IEC TC 3 and ISO TC 10, are central and considered capable of dealing with this problem in an appropriate way. The standard consists presently of two parts: IEC 81346-1 Part 1: Basic rules, and IEC 81346-2 Part 2: Classification of objects and codes for classes.
NOTE - International Standard 81346 was isssued 2009-07 replacing IEC 61346, which consisted of four parts: Part 1: Basic rules , Part 2: Classification of objects and codes for classes, Part 3: Application guidelines and Part 4: Discussion of concepts (aTechnical Report) and IEC/PAS 62400 Letter codes - Main classes and subclasses of objects according to their purpose and task. These publications have all been withdrawn.
The structuring principles of International Standard 81346-1 is a "backbone" for the structuring of products and systems and therefore also inherently of related documents and documentation. It is therefore referenced from a number of other publications like IEC 61082-1, IEC 61355, IEC 62023.
IEC 61666 Industrial systems, installations and equipment and industrial products - Identification of terminals within a system is directly based on IEC 81346.
The IEC 81346 series together with IEC 61175 Industrial systems, installations and equipment and industrial products - Designation of signals
provides the required links between software objects, e.g. programmable logic controllers languages as in IEC 61311-3 and the related hardware objects.
IEC 62491 Industrial systems, installations and equipment and industrial products - Labelling of cables and cores provides rules and guidelines for the labelling of cables and cores/conductors used in industrial installations, equipment and products, in order to maintain a clear relation between the technical documentation and the actual equipment and for other purposes.
The full capability of IEC 81346 is only taken into service by a limited segment of the market, and incompatible identification systems for some application areas exist. Therefore marketing and more concrete guidelines for specific areas, such as process control, may be necessary to develop.
Closely related topics: Document and documentation management, Information modelling, Semantic definitions.